Lower PartsValue Tier

CMMG

CMMG Lower Parts Kit

Complete mil-spec lower parts kit with all pins, springs, and detents. Quality baseline for any build.

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Quick Specs

Price: Contact for price
Weight: N/A
Brand: CMMG
Category: lower-part

Features

•Complete LPK
•Mil-spec trigger group
•All pins and springs included
•Pistol grip included

Compatibility Tags

family: ar-pattern

Overview

CMMG AR-15 Lower Parts Kits are crafted to meet and exceed mil-spec standards, providing builders with a reliable foundation for their AR-15 platform. These kits are known for their exceptional organization and quality control, with parts packaged in a labeled plastic form that saves significant installation time.

The CMMG LPK includes all necessary components to complete a stripped lower receiver, including takedown pins, safety selector, bolt catch assembly, magazine catch, and all required springs and detents. The mil-spec trigger group provides reliable function with standard AR-15 specifications. Each component is manufactured to proper dimensions and heat-treated appropriately for durability.

This kit represents an excellent value for builders who want quality mil-spec components without premium pricing. The straightforward design ensures compatibility with all standard AR-15 lower receivers, making it a popular choice for first-time builders and experienced gunsmiths alike.

Key Features

✓Complete lower parts kit with all pins, springs, and detents included
✓Mil-spec trigger group with reliable function
✓Organized packaging with labeled components for easy installation
✓Quality controlled parts manufactured to proper dimensions
✓Compatible with all standard AR-15 lower receivers
✓Includes pistol grip and all necessary hardware
✓Exceeds mil-spec standards for durability

Pros

+Excellent organization saves 20-30 minutes of sorting time
+Consistent quality control with proper fit on mil-spec lowers
+Outstanding value for the price point
+All components meet or exceed mil-spec standards
+Reliable performance in all conditions
+Easy installation for first-time builders

Cons

−Basic mil-spec trigger group (upgrade recommended for competition)
−Occasional quality control issues with missing parts reported
−Trigger pins may vary slightly in diameter (.1525" vs .154" standard)
−Standard components lack enhanced features of premium kits

Detailed Specifications

compatibility: AR-15 / M4 platforms
triggerPullWeight: 5.5-8.5 lbs (mil-spec)
pinDiameter: .154" standard (small pin)
finish: Phosphate on steel components
Material: Steel construction per mil-spec
includesFCG: Yes - complete trigger group
includesGrip: Yes - A2 style pistol grip

Compatible Platforms

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Custom AR-15 (Build From Scratch)

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PSA PA-15 16" Carbine

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Diamondback Firearms

Diamondback DB15 16"

Aero Precision

Aero Precision M4E1 Complete Rifle 16"

Bravo Company Manufacturing

BCM RECCE-16 MCMR

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